Worried about the cost of Japanese Knotweed removal? Here are The cost-effective solutions for Japanese knotweed removal without breaking the bank in [2023]

Japanese Knotweed is an invasive plant species that can cause significant damage to property and the environment. If you have Japanese Knotweed on your property, you may be worried about the cost of removal. However, there are cost-effective solutions to get rid of the plant without breaking the bank. In this article, we will explore some of the cost-effective solutions for Japanese Knotweed removal.

Solution 1: Digging Out

Digging out Japanese Knotweed is one of the most expensive solutions for removal. It involves digging up the plant’s roots and removing them from the soil. This can be done manually, but it is a time-consuming and labor-intensive process. You can hire a professional to do the job for you to save time and effort. However, it is essential to remove the plant’s roots entirely to prevent it from growing back. Digging out Japanese knotweed is one of the ways it is spread the soil containing the Japanese knotweed is dug out using a mechanical digger. after being placed on a big vibrating screening sieve, the small pieces of Rhizome are hand-picked out of the soil by laborers. this process is very laborious. If the soil contains a lot of clay and it is wet, this makes it near on impossible to remove the smaller fragments of the rhizome.

Disposal of soil containing Japanese knotweed to landfill sites can be expensive due to several factors:

  1. Environmental regulations: Japanese knotweed is listed as “controlled waste” under the Environmental Protection Act 1990 in the UK. The legislation requires strict adherence to disposal protocols to prevent the spread of this invasive species. Landfill operators must comply with these regulations, which involve additional precautions and monitoring to ensure proper containment and prevent further infestation.
  2. Treatment requirements: Before soil contaminated with Japanese knotweed can be accepted at a landfill, it often needs to undergo treatment to ensure the plant’s eradication or deactivation. Effective treatment methods include excavation, screening, heat treatment, or the use of specialized herbicides. These processes require expertise, time, and resources, adding to the overall cost of disposal.
  3. Landfill capacity and limitations: Landfill space is limited, and the disposal of Japanese knotweed-contaminated soil requires careful management. Landfill operators must allocate specific areas for this type of waste and implement containment measures to prevent the spread of Japanese knotweed within the landfill site. The dedicated space and additional precautions increase the cost of disposal.
  4. Specialist handling and transportation: The transportation and handling of soil containing Japanese knotweed require trained personnel and specialized equipment. Proper containment during transportation is crucial to prevent accidental spreading of the plant. These specialized procedures and equipment contribute to the overall cost.
  5. Insurance and liability: Due to the potential risks associated with Japanese knotweed, landfill operators may require additional insurance coverage to mitigate any potential legal and financial liabilities resulting from its disposal. These insurance costs are factored into the overall expense of sending Japanese knotweed-contaminated soil to landfill sites.

Bunding Japanese knotweed

Refers to a containment measure used to restrict the spread of Japanese knotweed and prevent its further infestation. The term “bunding” refers to the construction of physical barriers or structures to contain and isolate the invasive plant. Here’s an overview of how bunding is used specifically for Japanese knotweed:

Construction of barriers: Bunding involves creating physical barriers around areas infested with Japanese knotweed. These barriers can be constructed using various materials, such as impermeable membranes, geotextiles, or reinforced concrete.

Depth and width: The bunds are typically constructed to a specified depth and width to effectively contain the Japanese knotweed and its extensive underground rhizome system. The depth of bunding may vary depending on local regulations and the severity of the infestation.

Barrier effectiveness:

The bunding materials used are designed to be impermeable, preventing the spread of Japanese knotweed rhizomes through the barrier. This helps to isolate and contain the plant within the designated area.

Root barrier membranes: In some cases, specialized root barrier membranes are installed vertically into the ground to create an underground barrier. These membranes are resistant to the penetration of Japanese knotweed rhizomes and provide additional containment.

Monitoring and maintenance: Bunds require regular monitoring and maintenance to ensure their effectiveness. Any signs of knotweed growth or breaches in the bunding structure should be promptly addressed to prevent the plant from spreading beyond the containment area.

Bunding is a commonly used technique for containing Japanese knotweed during construction projects or when it is not feasible to completely eradicate the plant. It helps to prevent the further spread of the invasive species, protecting surrounding areas and minimizing the risk of damage caused by Japanese knotweed’s aggressive growth.

Solution 2: Herbicides

Using herbicides is another cost-effective solution for Japanese Knotweed removal.

The herbicide works by disrupting the plant’s growth and metabolic processes, eventually leading to its death. Here’s a general overview of how herbicides kill Japanese knotweed:

Absorption: The herbicide is applied to the foliage of the Japanese knotweed plant, either as a spray or through direct application.

Translocation: Once the herbicide comes into contact with the plant, it is absorbed through the leaves and stems. It then begins to move within the plant’s vascular system, also known as translocation.

Disruption of growth: The herbicide interferes with the plant’s ability to produce essential proteins and enzymes necessary for growth and development. This disruption affects various metabolic processes within the plant.

Cell damage:

The herbicide may cause damage to the cell walls and membranes of the plant, leading to cell leakage and loss of turgidity. This damage weakens the plant’s structure and reduces its ability to take up water and nutrients.

Inhibition of photosynthesis: Herbicides often target chlorophyll, a pigment responsible for photosynthesis. By inhibiting chlorophyll production or function, the herbicide disrupts the plant’s ability to convert sunlight into energy, causing a decline in overall plant health.

Starvation: As the herbicide continues to impair the plant’s growth and metabolic processes, the Japanese knotweed gradually weakens and becomes unable to generate sufficient energy or nutrients. This leads to a state of starvation and eventually results in the plant’s death.

The government & environmental agency would always prefer that the plant is Herbicide treated responsibly institute as this minimizes the risk of the plant being spread to other areas for re-infestation.

It’s important to note that the effectiveness of herbicides can vary depending on the specific product, application method, and stage of Japanese knotweed growth. Additionally, the use of herbicides should be done with caution and in compliance with local regulations to minimize any potential negative impacts on the environment. Consulting with professionals or local authorities experienced in Japanese knotweed control is recommended for effective and responsible management.

Solution 3: Smothering

Smothering Japanese Knotweed is another cost-effective removal solution. It involves covering the plant with a barrier, such as a tarpaulin or plastic sheeting, to prevent sunlight from reaching the plant. This will eventually kill the plant, but it can take up to three years for the plant to die. This method is best suited for small infestations, and it is not recommended for large-scale removal.


  1. How much does Japanese Knotweed removal cost? A. The cost of Japanese Knotweed removal varies depending on the size of the infestation and the removal method used. On average, the cost can range from £1,000 to £5,000. for herbicide treatment. Removal of soil containing Japanese knotweed can cost many tens of thousands of pounds.
  2. How long does it take to remove Japanese Knotweed? A. The time it takes to remove Japanese Knotweed depends on the removal method used, the size of the infestation, and the location. It can take several months to several years to completely kill or remove the plant.
  3. Can I remove Japanese Knotweed myself? A. It is not recommended to remove Japanese Knotweed yourself, as it can cause the plant to spread further. It is best to hire a professional to carry out the removal.

Japanese Knotweed is a destructive plant species that can cause significant damage to property and the environment. If you have Japanese Knotweed on your property, it is essential to take immediate action to remove the plant. The removal cost can be a concern, but cost-effective solutions are available. By using a combination of methods and hiring a professional like me you can get rid of the invasive plant without breaking the bank.

Call Stephen on 07753682333 for more advice.